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multiaxial-cyclic-stress-strain-relationship
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Multiaxial stress-strain modeling and effect of additional hardening due to nonproportional loading
, Article Journal of Mechanical Science and Technology ; Volume 21, Issue 8 , 2007 , Pages 1153-1161 ; 1738494X (ISSN) ; Ghajar, R ; Farrahi, G ; Sharif University of Technology
Korean Society of Mechanical Engineers
2007
Abstract
Most engineering components are subjected to multiaxial rather than uniaxial cyclic loading, which causes multiaxial fatigue. The pre-requisite to predict the fatigue life of such components is to determine the multiaxial stressstrain relationship. In this paper the multiaxial cyclic stress-strain model under proportional loading is derived using the modified power law stress-strain relationship. The equivalent strain amplitude consisted of the normal strain excursion and maximum shear strain amplitude is used in the proportional model to include the additional hardening effect due to nonproportional loading. Therefore a new multiaxial cyclic stress-strain relationship is devised for out of...